Trolley-wheel.



Patented Feb. l9, I90L c. n. McADUU.

TBOLLEY WHEEL.

(Application filed Dec; 1, 1900.)

I y v Y M Mi wm GHAUNOEY R. MCADOO, OF INDIANA, PENNSYLVANIA.

TROLLEY-WHEEL.

SPECIFICATION formingpart Of Letters Pateht NO. 668,538, dated February 19, 1901.

A li ti fil d December 1, 1900. Serial No. 38,364. (No model.)

To all whom, it ntay concern.-

Beit known that I, OHAUNOEY R. MOADOO, a citizen of the United States, residing at Indiana, in the county of Indiana, State of Pennsylvania, have invented certain new and useful Improvements in Trolley-VVheels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to overhead trolleys for electric railways; and it has for one object to provide a construction wherein the trolleywheel will be prevented from leaving the trolley-wire excepting when the shifting-line is drawn downward to draw the wheel from the wire, a further object of the invention being to provide such a specific construction of trolley-arm as will be cheap and simple of manufacture and will facilitate operation of the structure, additional objects and advantages of the invention being apparent from the following description:

In the drawings forming a portion of this specification and in which like numerals of reference indicate similar parts in theseveral views, Figure l is a perspective view showing the upper end of a trolley-arm with Wheel therein and illustrating the arrangement for preventing the wheel from leaving the trolley-wire. Fig. 2 is a transverse section through the wheel and the head of the trolley-arm.

Referring now to the drawings, the present invention comprises a trolley-arm 5, the up per end of which is bifurcated. to form two members 6 and '7, which are spaced apart to receive the trolley-Wheel 8, which is rotatably mounted upon a spindle 9; The member 7 extends above the spindle to lie slightly above the uppermost point of the periphery of the trolley-Wheel when the wheel is in its operative position in contact with a trolleywire. The member 6 also extends above the periphery of the trolley-wheel at a point opposite to the upper end of the member 6, and it has also a lateral extension 10, which projects beyond the periphery of the trolleywheel at the rear side of the latter.

Through the upwardly-extending portion 2 of the member 6 there is formed a vertical being brought through the lower end of the perforation in the member 6 and then bent upwardly against the outer face of said member to prevent the spring from rotating, while the opposite end thereof is wrapped around the laterally-bent end of the shaft. Thus when the shaft is rotated to bring the laterally-bent end thereof from across the trolley- Wheel the spring is placed under torsional straimsand when the shaft is released the spring acts to return the shaft and hold it yieldably in its returned position.

In swinging from the shoulder on the member 7 the upper end of the shaft 13 swings in a direction opposite to the direction of movement of the trolley-arm with the car. In practice the upper end of the shaft 13 lies over the trolley-wire with which the trolley-Wheel is engaged and prevents the trolley-wheel from leaving the wire. When the trolley reaches a hanger of the wire, the lateral end of the shaft 13 strikes against the hanger and the shaft is moved against the tendency of its retaining-spring to permit the trolley to pass the hanger, and when it has passed the laterally-bent end of the shaft returns to its transverse position.

' In order that the end of the shaft 13 may be moved from its operative position to permit drawing the trolley-arm to disengage the trolley -wheel from the wire, an eye 15 is formed in the lateral end of the shaft, and with this eye is engaged a cord 16, which is passed through an eye 17 in the end of the portion 10 of the member 6, and when this cord is drawn upon the end of the shaft is first swung away from across the trolley-wire until it strikes the member 6 adjacent to the eye 17, after which further pulling down upon the cord has the effect of lowering the trolley.

It will thus be seen that there is provided a construction wherein the wheel will be prevented from displacement from the trolleywire when in use and in which the trolley may be readily drawn down when desired, it being understood that modifications of the specific construction shown may be made and that any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is 1. Adevice of the class described comprising an arm having its upper end bifurcated to form two members, a trolley rotatably mounted between the members, one of said members extending above the periphery of the wheel and having a shoulder, the second member extending above the wheel opposite to the first member and extending rearwardly beyond the periphery of the Wheel, a vertical perforation in the second member, a springpressed shaft in said perforation and having its upper end bent laterally to lie against the shoulder of the first member, an eye in the rearwardly-extending portion of the second member, and a cord passed through the eye and engaged with the laterally-bent end of the shaft to move it from the shoulder.

2. A device of the class described comprising an arm having its upper end bifurcated to form two members, a trolley-wheel rotatably mounted between the members, one of said members extending above the periphery of the wheel and having a shoulder, the second member extending above the wheel opposite to the first member and having a rear- Wardly-extending portion extending beyond the periphery of the wheel, a vertical perforation in the second member, a shaft disposed in the perforation and having its upper end bent laterally to lie transversely and against the shoulder of the first member, a helical spring disposed upon the shaft within the perforation, said spring having its lower end taken out of the perforation and bent to lie against the face of a member of the arm and having its opposite end bent around the laterally-turned end of the shaft to hold the shaft yieldably against the said shoulder, the second member having an eye in its rear- Wardly-extending portion, and a cord attached to the laterally-bent end of the shaft and passed through said eye to draw the shaftfrom its position across the trolley-wheel.

In testimony whereof I hereunto set my hand in the presence of Witnesses.

CHAUNOEY R. MGADOO. Witnesses:

SAM H. HUGHES, J. A. CROSSMAN. 

